F&G RY posted:WD-40 is not oil. WD stands for water displacement. Grease the gears with something like Red n Tacky or a number of other automotive greases. Oil the motor with train oil. LaBelle 103 would work well. Then you should be fine.
Correct--developed in US missile program for that very reason. Helps to loosen things BUT clean and lubricate after. Grease for gears, oil for axles